[tor-relays] why non-exit node becomes last in the circuits?

[tor-operator-sahara-it]

Hello.

On Tails:
Today i found that my jabber messenger (with server in *.onion) use onion circuit with three nodes, and two times from two exit-nodes were very strange.

https://metrics.torproject.org/rs.html#details/92E807AC5E23CCD9FE623EA4DC020B1627A0D09B

https://metrics.torproject.org/rs.html#details/AC5CECEF6AF649F2A7F047D102FE9B461DA9234E

They havnt exit-flag. Why it happen?
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